public ForwardRenderPipeline()
{
framebuffer_color = Ogl.GenFramebuffer("Forward Color");
Ogl.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer_color);
Ogl.DrawBuffer(DrawBufferMode.ColorAttachment0);
Ogl.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
}